Supporting shelf

ABSTRACT

A supporting shelf includes a bearing seat, a first supporting arm, a second supporting arm, a third supporting arm and a setting seat. The bearing seat is pivotally connected with an end of the first supporting arm allowing the supporting shelf to swing left or right. An end of the second supporting arm is connected with another end of the first supporting arm through a pin-connected mechanism. An end of the third supporting arm is connected with another end of the second supporting arm. The setting seat is pivotally connected with a joint. The joint is pivotally connected with another end of the third supporting arm. The setting seat is for fixing a LCD moving up, down, left or right through the joint, whereby the length of the supporting shelf is increased, and the action area of the LCD is extended and is improved agility.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a supporting shelf and, moreparticularly, to a supporting shelf that is composed of a plurality ofsupporting arms, each of which is pivotally connected with each other.These supporting arms are extendable so that they can be adjusted tomeet the user's needs.

2. Description of the Related Art

A common LCD screen with a supporting seat is usually set upon a table.Its user can adjust the viewing angle of the LCD for a more comfortableview. However, the design of the LCD is based upon it sitting upon atable, thus reducing the choices of viewing angles. In response to thisproblem, a supporting shelf was invented with a supporting arm attachedto the LCD that allows the screen to be rotated. Thus such an LCD is notrestricted by the supporting seat and can rotate freely.

The above-mentioned supporting shelf overcomes the restrictions in theaction area of the single rotating supporting arm due to the arm'slength.

For extending the action area of the LCD and increasing its agility, wethe length of the supporting shelf must be increased whilst stillallowing the supporting shelf to swing left or right and extend forwardsor backwards to meet the user's needs.

SUMMARY OF THE INVENTION

It is therefore a principal objective of the present invention toprovide a supporting shelf having an end attached to a LCD, which iscomposed of a plurality of supporting arms, and each of these supportingarms is pivotally connected with each other. These supporting arms areextendable between each other for extending the length of the supportingshelf to meet the user's needs.

To further achieve the above objective, one feature of the presentinvention is to provide for a supporting shelf including a bearing seat;at least a first supporting arm having an end pivotally connected withthe bearing seat; a first air cylinder defined in an inner portion ofthe first supporting arm and through a first fixing screw rod to adjustthe moment arm of the first air cylinder for adjusting a bearing of thesupporting shelf; at least a second supporting arm having an endpivotally connected with another end of the first supporting arm througha pin-connected mechanism; a second air cylinder defined in an innerportion of the second supporting arm and through a second fixing screwrod to adjust the moment arm of the second air cylinder for adjusting abearing of the supporting shelf; at least a third supporting arm havingan end connected with another end of the second supporting arm; a jointpivotally connected with an other end of the third supporting arm; and asetting seat pivotally connected with the joint.

To provide a further understanding of the invention, the followingdetail description illustrates embodiments and examples of theinvention, this detailed description being provided only forillustrating the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings included herein provide a further understanding of theinvention. A brief introduction of the drawings is as follows:

FIG. 1 is a bottom plan view of a preferred embodiment of the presentinvention.

FIG. 2 is a side view of the preferred embodiment of the presentinvention.

FIG. 3 is an enlarged view of an A-part according to FIG. 2.

FIG. 4 is an enlarged view of a B-part according to FIG. 2.

FIG. 5 is an enlarged view of a C-part according to FIG. 2.

FIG. 6 is a first action view of the preferred embodiment of the presentinvention.

FIG. 7 is a second action view of the preferred embodiment of thepresent invention.

FIG. 8 is a third action view of the preferred embodiment of the presentinvention.

FIG. 9 is a fourth action view of the preferred embodiment of thepresent invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Referring now to the drawings wherein the showings are for the purposeof illustrating the preferred embodiments of the present invention only,and not for the purpose of limiting the same.

Referring to FIGS. 1 to 5, the present invention provides a supportingshelf including a bearing seat 10, a first supporting arm 20, a firstair cylinder 21, a first fixing screw rod 30, a second supporting arm40, a second air cylinder 41, a second fixing screw rod 50, apin-connected mechanism 60, a third supporting arm 70, a setting seat80, a joint 90, and a plurality of casings 100.

The bearing seat 10 is pivotally connected vertically with a rear end ofthe first supporting arm 20 through a pivot 11 for the supporting arm 20when swinging left or right as shown in FIG. 7.

The first supporting arm 20 has the first air cylinder at an innerportion of it. There is a cross rod 22 and a pin-connected part 23disposed at the inner portion of the first supporting arm 20. A frontend of the first air cylinder 21 is pivotally connected to the cross rod22. A rear end of the first air cylinder 21 is pivotally connected tothe pin-connected part 23. Two opposite sides of the pin-connected part23 extend with an axle 232 respectively. Two opposite side walls of thefirst supporting arm 20 form a slideway 24. The axles 232 fit with theslideway 24.

The first fixing screw rod 30 screws into the pin-connected part 23, sothat the first fixing screw rod 30 adjusts the front or rearwardposition of the pin-connected part 23 as shown in FIG. 3. This allowsthe pin-connected part 23 to slide forward or backward in the slideway24. Therefore, the moment arm of the first supporting arm 20 ischangeable. As such, the amount of weight the first supporting arm 20can bear is variable.

The second supporting arm 40 having a rear end is pivotally connectedwith a front end of the first supporting arm 20 through thepin-connected mechanism 60. Both the front end and the rear end of thepin-connected mechanism 60 have a pivot 61 respectively as shown in FIG.4. The second supporting arm 40 and the first supporting arm 20 canextend forwards or backwards through the pivots 61 as shown in FIG. 8and FIG. 9. The second supporting arm 40 has the second air cylinder 41at an inner portion of it. There is a cross rod 42 and a pin-connectedpart 43 disposed at the inner portion of the second supporting arm 40. Afront end of the second air cylinder 41 is pivotally connected to thecross rod 42. A rear end of the second air cylinder 41 is pivotallyconnected to the pin-connected part 43. Two opposite sides of thepin-connected part 43 extend with an axle 432 respectively. Two oppositeside walls of the second supporting arm 40 form a slideway 44respectively. The axles 432 fit with the slideways 44.

The second fixing screw rod 50 screws with the pin-connected part 43, sothat the second fixing screw rod 50 can adjust the up or down positionof the pin-connected part 43. Then the pin-connected part 43 can slideup or down in the slideway 44. Thereby, the moment arm of the firstsupporting arm 40 is changed. The first supporting arm 40 adjusts thebearing of the supporting shelf.

As shown in FIG. 5, a rear end of the third supporting arm 70 isconnected vertically with a front end of the second supporting arm 40.

A front end of the setting seat 80 is attached to a LCD 120. The rearend of the setting seat 80 is pivotally connected with the front end ofthe joint 90 vertically. The joint 90 is pivotally connected with thefront end of the third supporting arm 70 horizontally. The setting seat80 allows the LCD 120 move up, down, left or right through the joint 90as shown in FIG. 5 and FIG. 6.

Each of the casings 100 is a rectangular hollow casing. The casings 100are disposed adjacent to a side edge of the supporting arms forreceiving a wire 110 disposed on the supporting shelf as shown in FIG.3. The casings 100 are for avoiding the wire 110 being exposed purelyfor aesthetic purposes.

So, the present invention has the following characteristics:

1. The bearing seat 10 is pivotally connected vertically with a rear endof the first supporting arm 20 through the pivot 11 for the supportingshelf swinging left or right. The second supporting arm 40 has a rearend that is pivotally connected with a front end of the first supportingarm 20 through the pin-connected mechanism 60 for the second supportingarm 40 and the first supporting arm 20 when they are extended forwardsor backwards action. So the pivoted-connection between the secondsupporting arm 40 and the first supporting arm 20 is not only extendingthe length of the supporting shelf, but also increasing its agility inspace to meet the different need of the user.

2. The first air cylinder 21 and the second air cylinder 41 adjustthemselves, and their moment arms, through the first fixing screw rod 30and the second fixing screw rod 50 respectively. Both the first andsecond fixing screw rods 30 and 50 adjust the bearing of the supportingshelf.

3. The setting seat 80 is pivotally connected with the joint 90 makingthe LCD 120 moving up, down, left or right through the joint 90 forextending the action area of the LCD 120 and increasing its agility.

There has thus been described a new, novel and heretofore unobvioussupporting shelf eliminating the aforesaid problem in the prior art.Furthermore, those skilled in the art will readily appreciate that theabove description is only illustrative of specific embodiments andexamples of the invention. The invention should therefore cover variousmodifications and variations made to the herein-described structure andoperations of the invention, provided they fall within the scope of theinvention as defined in the following appended claims.

1. A supporting shelf, comprising: A bearing seat; At least a firstsupporting arm having an end pivotally connected with the bearing seat;A first air cylinder defined in an inner portion of the first supportingarm and through a first fixing screw rod to adjust the moment arm of thefirst air cylinder for adjusting a bearing of the supporting shelf; Atleast a second supporting arm having an end pivotally connected withanother end of the first supporting arm through a pin-connectedmechanism; A second air cylinder defined in an inner portion of thesecond supporting arm and through a second fixing screw rod to adjustthe moment arm of the second air cylinder for adjusting a bearing of thesupporting shelf; At least a third supporting arm having an endconnected with another end of the second supporting arm; A jointpivotally connected with an other end of the third supporting arm; and Asetting seat pivotally connected with the joint.
 2. The supporting shelfof claim 1, further comprising a plurality of casings disposed on a sideedge of the supporting shelf.
 3. The supporting shelf of claim 1,wherein the bearing seat pivotally connects vertically with the end ofthe first supporting arm through a pivot for the supporting shelf whenit is swung left or right.
 4. The supporting shelf of claim 1, whereinthe pin-connected mechanism is connected with both the first supportingarm and the second supporting arm for extending forwards or backwardsboth of the second supporting arm and the first supporting arm.
 5. Thesupporting shelf of claim 1, wherein the setting seat attaches to a LCDmonitor and allows the LCD monitor to move up, down, left or rightthrough the joint.